| Acronym | Definition |
|---|
| OCGS➣Ontario Council on Graduate Studies (Council of Ontario Universities; Canada) |
| OCGS➣Oakland County Genealogical Society (Oakland County, Michigan) |
| OCGS➣Oxford and Cambridge Golfing Society |
| OCGS➣Oklahoma City Geological Society, Inc. (est. 1921; Oklahoma City, OK) |
| OCGS➣Office of the Chief of the General Staff (various locations) |
| OCGS➣Oro Christian Grace School (China) |